Apparatus for scrubbing and treating gravel



July 10, 1934. w. H. ALLSWEDE .1,965,563

` APPARATUS FR SCRUBBING AND TREATING @RAVEL Filed Aug` 1,- 195o 2 sheets-'sheet 1 *D 1N VEA/TOR a c B Y A TTORNE y l July 10, 1934. w. H. ALLSWEDE 1,965,568

APPARATUS FOR SCRUBBING AND TREATING GRAVEL Filed Aug. l, l930 2 Sheets-Sheet 2 INVENTOR ATTORNEY S Patented July/,10, 1934 UNITED lSTATES PATENT OFFICE APPRATUS FOR SCRUBBING AND TREATING GRAVEL 6 Claims.

This invention relates to an improved apparatus for scrubbing and treating gravel to eliminate clay, rotten stone and the like.

The objects of the invention are:

First, to eliminate clay and rotten the like from gravel.

Second, to provide an improved scrubbing means for that purpose.

Third, to provide an improved ball mill for scrubbing purposes.

Objects pertaining to details and economies of construction and operation will appear from the description to follow. y,

A preferred embodiment o f the invention is illustrated in the accompanying drawings, in which:

Fig. l is a detail elevation view partially in section on line 1--1 of Figs. 2, 3 and 4.

Fig. 2 is-an enlarged rear end elevation taken stone and 20 from the left hand of Fig. 1.

Fig. 3 is an enlarged detail cross sectional view on line 3-3 of Fig. 1, showing details of the tumbling barrel meazns.

Fig. 4 is a similar detail cross sectional view on section line 4-4 of Fig. 1, through the gravel rinsing screen part.

Fig. 5 is a detail perspective view of one of the liner sections.

Fig. 6 is a detail sectional view on line 6-6 of Fig. 5 showing details of construction.

The parts will be identified by their numerals of reference which are the same in all the views.

1 is a cylindrical drum of the ball mill barrel, preferably 48 to '72 inches in diameter and of corresponding length as illustrated. In practice it is supported at an inclination of one and onehalf inches to the foot, the higher end being the feed'end and the lower end being the discharge end. 2 is a cylindrical gravel rinsing and grading screen of like diameter to the said drum 1, secured to the discharge end thereof for screening the gravel after it has been scrubbed. It contains appropriate screen slots to secure the grade and size of gravel required. 3 are bearing rings which surround the said barrel 1 at suitable intervals to adequately support the same, two being shown in the structure. These are supported on pairs of rollers 4, the rollers on each side being carried on shafts 41 which are supported in suitable bearings 42, 42 on a base 5. Gear ring 6 is provided at a convenient point along the length of the drum 1 to drive the same by suitable pinion in a well known manner. The pinion and driving means are not shown, as my invention does not pertain thereto.

The feed end of vmy improved drum is closed by the plate 'l which has a central circular opening '71 for the intake of material. The interior of the barrel is divided into compartments by plate rings 8, seen particularly in Fig. 1, a plate being shown at the extreme end of thev said drum. To these plates 8 are secured conical scrubbing screens 9 of about the proportion shown, which conical screens contain round holes one and three-fourths inches in diameter or larger so as to pass the material to be scrubbed, and about one-half inch apart. The gravel introduced is screened for size in that all large pieces are eliminated. The inner ends of the screens 9 are closed by removable caps 91 to facilitate repair and to permit of the introduction of the steel balls 92. Each compartment of the drum is lined with steel plates l0 which carry inch square longitudinal bars 1l which are riveted thereto, said lining being detachably secured so that it can be readily renewed when worn.

Within the compartment I place a quantity of steel balls 92 of such size that they will not pass through the apertures in balls in practice are steel about two to four inches in diameter. Of course, cast iron balls or round stones might be used.

In operation the perforated Water pipe 13 connected to a supply 14 delivers water to the rinsing and grading screen 2. effective if but a single length of scrubber with the rinsing and grading screen is provided. However, its action is greatly enhanced by a plurality and in practice I have used four ordinarily, as illustrated in the drawings. In the operation, gravel, containing impurities such as clay and rotten stone and other hard stratified material, is introduced into the drum at 71 by any suitable means, as by chute or beltconveyor. A quantity of water is introduced at the same time by hose or otherwise,.enough to reduce the mass to a muddy consistency. The machine is then revolved, all tendency of the material to stratify in the drum being obviated by the agitating bars 11 which carry the material and the steel ballstogether up at the side and permit them to tumble down with a crushing action which quickly disintegrates all clay and rotten stone or like impurities within the mass of gravel but does. not in any way grind the gravel. It is not the intent to grind the gravel.

lAs soon as the machine is started, a continuous supply of the gravelly material to be treated is fed into the drum with the necessary water to secure My improved mill is very 8 the screens 9. These the muddy consistency andthe action, the same being continuous after the start.

Owing'tol the incline of the drum this muddy material with the tumbling ballsl accomplished the whole mass of When this is discharged onto the gravel rinsing the material is removed.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In an apparatus for scrubbing and treating gravel, the combination of a'tumbling barrel ball mill Crusher and grader of cylindrical form, a cylindrical gravel charged.

2. In an apparatus a conical scrubbing screen connected to the said partition ring and pointing forwardly, apertures larger' than the size of gravel to be thereto, and tumbling balls of such size as not to pass the said scrubbing screen adapted to tumble in said barrel and roll up into said screen to crush defective material so that it may be discharged.

3. In an apparatus for scrubbing and treating y partments, and tumbling balls of such size as not to pass the said scrubbing screens adapted to tumble in said compartments and roll up into screen adapted to tumble roll up into said screen to crush defective material so that it may be discharged.

5. A tumbling barrel mill having a conical scrubbing screen and WILLIAM H. ALLSWEDE.

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